US4335768A - Depth of cut adjustment mechanism - Google Patents

Depth of cut adjustment mechanism Download PDF

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Publication number
US4335768A
US4335768A US06/160,822 US16082280A US4335768A US 4335768 A US4335768 A US 4335768A US 16082280 A US16082280 A US 16082280A US 4335768 A US4335768 A US 4335768A
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US
United States
Prior art keywords
front shoe
bolt
cutting blade
housing
shoe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/160,822
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English (en)
Inventor
Rainer Bachmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP19800103284 priority Critical patent/EP0042445B1/de
Priority claimed from EP19800103284 external-priority patent/EP0042445B1/de
Application filed by Black and Decker Inc filed Critical Black and Decker Inc
Application granted granted Critical
Publication of US4335768A publication Critical patent/US4335768A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/22—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring existing or desired position of tool or work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
    • B27C1/10—Hand planes equipped with power-driven cutter blocks

Definitions

  • portable power planers comprise a motor driven rotary cutter head having one or more cutting blade assemblies disposed thereon for performing a cutting operation upon the surface of a workpiece as the cutter head rotates.
  • the bottom surface of the tool comprises a fixed shoe located rearwardly of the cutter head and an adjustable shoe disposed forwardly of the cutter head. As the front shoe is adjusted upwardly or downwardly, the cutting depth of the cutting blade of the planer is adjusted accordingly.
  • Known elevation adjustment arrangements for power planers typically comprise a stud which extends upwardly from the front shoe through a boss having an adjustment cap threaded onto the top of the stud to move the shoe vertically upwardly or downwardly as the cap is turned.
  • no calibration is provided to indicate to the operator exactly and precisely the depth of cut setting.
  • fine adjustments generally cannot be made with conventional adjustment mechanisms.
  • Zero on the scale corresponds to the position of the adjustable shoe providing a zero depth of cut.
  • the preferred embodiment of the present invention enables the operator to adjust the depth of the cut in 0.1 mm steps from 0 to 1.5 mm.
  • Another object of the present invention is to provide an improved elevation adjusting mechanism for a power planer which is highly stable and thus capable of accurate, fine adjustments in the depth of cut for more accuracy in cutting.
  • the present invention accomplishes this by utilizing a double thread on a bolt engaging the stem of the adjustable shoe which permits the use of a steeper pitched thread to provide the desired range of elevational movement in the adjustable shoe with reduced rotational movement of the adjustment knob, while at the same time providing increased thread contact for improved stability.
  • Another object of the present invention is to provide an improved elevation adjusting mechanism having a positive "park" position wherein the adjustable shoe extends downwardly beyond the cutting blade of the cutting head so that the cutting blade does not mar the work surface when the power planer is set down. Additionally, the present invention also includes means for positively locating the park position.
  • the preferred depth of cut adjustment mechanism for a power planer includes a double threaded bolt which extends downwardly into engagement with a corresponding internally double threaded stem extending upwardly from the front shoe of the planer. Rotation of the bolt is controlled by a knob attached to the head portion of the bolt.
  • the knob in turn has associated therewith a height adjustment scale which is capable of being readily calibrated, wherein zero on the scale corresponds to the position of the adjustable front shoe providing zero depth of cut.
  • the adjustment mechanism further provides a positively engageable park position wherein the front shoe is extended downwardly beyond the fixed shoe so that the cutting blade of the planer does not mar a smooth surface when the power planer is set to rest thereupon.
  • FIG. 1 is an elevated view of a power planer incorporating the elevation adjusting arrangement of the present invention
  • FIG. 2 is a detail elevated view, partially in section, of the elevation adjusting arrangement of the present invention
  • FIG. 3 is an exploded view of the elevation adjusting arrangement shown in FIG. 2;
  • FIG. 4 is a detail view showing the interface between the ratchet springs and the ratchet disc in the elevation adjustment arrangement of the present invention
  • FIG. 5 is a front elevated view of the left-hand and right-hand housing portions of the power planer of the present invention.
  • FIG. 6 is a plan view of the front portion of the housing of the power planer of the present invention.
  • FIG. 7 is an exploded perspective view of the elevation adjusting arrangement of the present invention.
  • a power planer 2 incorporating an elevation adjusting mechanism according to the present invention is shown.
  • the power planer 2 is otherwise conventional in overall layout, having a clamshell housing 4 which is shown partially cutaway to expose the cutter head 6 which supports at least one cutting blade 8.
  • the planer has a fixed shoe 14 and an adjustable front shoe 16 for engaging the work surface to be operated upon.
  • the adjustable shoe 16 can be adjusted in elevation to control the depth to which the cutting blade 8 of the cutter head 6 penetrates the work.
  • FIG. 2 is an elevated view, partially in section, showing the elevation adjusting arrangement of the present invention assembled into the right-hand portion 18 of the clamshell housing 4.
  • the control knob assembly 20 comprises upper and lower halves 26 and 24 which are detachably clipped together as shown.
  • the lower portion 24 of knob assembly 20 rests upon a flange 22 which has scale markings thereon and hence is referred to herein as a scale member.
  • the adjustable shoe 16 is equipped with a stem 32 formed integrally with the base 34 thereof.
  • the stem 32 engages sleeve bearings 36 and 38 integrally formed on the molded housing half 18, as best shown in FIG. 5.
  • the bearings 36 and 38 and stem 32 are formed with mutually engaging longitudinally extending surface flats 37 (FIGS. 5 and 7) to prevent rotation of adjustable shoe 16 with respect to housing 18.
  • a bolt 40 threadably engages the stem 32 at thread means 42 so that rotation of knob assembly 20 will result in vertical movement of adjustable shoe 16.
  • the stem 32 is moved upwardly or downwardly in sleeve bearings 36 and 38 depending upon the direction of rotation of the knob 20.
  • Thread means 42 consists of a double thread 48 formed on the inner wall of bore 50 and a corresponding double thread 52 formed on the shank of bolt 40.
  • the double threaded bolt 40 and stem 32 each have two threads whose distance apart is generally half of the true pitch of the threads.
  • the double thread arrangement reduces the size of the thread necessary to maintain the core strength of the bolt and permits the use of a greater pitch to provide the desired range of elevational movement with less rotational movement of knob assembly 20.
  • more thread contact will exist between the bolt and the bore to provide more frictional forces at the contact interface and thereby greater stability at a selected setting.
  • Stability is particularly important for cutting accuracy when 0.1 mm elevational differences are desired and only 1.5 mm of elevational travel is scaled by the adjustment mechanism.
  • the stability of the adjustment shoe 34 also insures a uniform depth of cut across the width of the power planer.
  • Bolt 40 is provided with a hexagonal head shank portion 54 which engages a corresponding hexagonal opening 25 in the lower knob half 24 of knob assembly 20 thereby keying the bolt 40 to the control knob 20.
  • the insertion of bolt 40 into thread means 42 also rotatably mounts lower knob half 24 onto scale member 22.
  • a compression spring 44 is interposed between the end-face of sleeve bearing 38 and a washer 46 seated upon a shoulder in the stem 32 of adjustable shoe 16. The washer 46 is required to provide a firm seat for spring 44 so that a proper bias force is maintained against stem 32.
  • the mutually engageable left-hand and right-hand housing halves 17 and 18 are shown.
  • the housing halves 17 and 18 conjointly define an annular recess 9 having two flats 11 (only one of which is shown) formed at diametrically opposed locations on the inner recess wall 13 thereof.
  • a ratchet disc 19 having a plurality of radially spaced notches 60 is seated in the recess 9 and keyed against rotation by the flats 11 (FIG. 7).
  • the scale member 22 is equipped with slotted openings 23 formed in the base 55 thereof for receiving two springs 58 juxtaposed across diametrically opposite arcs of circular scale member 22.
  • springs 58 have an intermediate contact point 62 which protrudes from scale member 22.
  • the notches 60 are circumferentially spaced at predetermined angular increments. The spacing of the angular increments and the pitch of the thread means 42 are so selected that each angular increment corresponds to a 0.1 mm change in elevation of the adjustable shoe 16.
  • the contact points 62 engage respective adjacent notches 60 for each incremental change in elevation of the shoe 16.
  • the engagement of the contact points 62 of the springs 48 with the notches 60 provides an audible "click” sound indicating to the operator each incremental change in elevation. Further, the resilient force developed by the springs 58 ensures that the knob assembly 20 stays firmly in the set position until deliberately changed by the operator.
  • a plurality of apertures or bores 29 are formed in wall 31 of the scale member 22.
  • twenty bores are used and are distributed about a circle having a diameter 33.
  • Pins 28 are inserted through the apertures or bores 45 in lower knob half 24 into a selected pair of bores 29 in scale member 22 to secure the lower knob half 24 to scale member 22 and prevent rotational movement therebetween.
  • scale member 22 has a notched scale 41 at the outer periphery thereof.
  • a mark 43 formed on the housing 4 is utilized as a position indicator for the scale 41.
  • the scale member 22 is rotated until the zero elevation position of the scale 41 is aligned with the position indicator 43 on the housing 4.
  • the pins 28 are then inserted, thereby keying the scale member 22 to the lower half 24 of knob assembly 20.
  • the upper knob half 26 is then snapped onto the lower knob half 24 to prevent the pins 28 from becoming dislodged.
  • the elevation adjusting arrangement of the present invention also provides a positively located park position.
  • the adjustable shoe 16 In the park position, the adjustable shoe 16 is extended downwardly beyond the zero elevation position so that the cutting blade 8 of the cutter head 6 does not mar the surface upon which the power planer is set when not in use.
  • an abutment 64 is formed on the upper end face of the sleeve bearing 38 as shown in FIG. 5.
  • the scale member 22 is provided with a corresponding abutment key 66 along the interior surface thereof (FIG. 3).

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
US06/160,822 1980-06-12 1980-06-18 Depth of cut adjustment mechanism Expired - Lifetime US4335768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19800103284 EP0042445B1 (de) 1980-06-12 1980-06-12 Schnittiefeneinstellmechanismus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19800103284 EP0042445B1 (de) 1980-06-12 1980-06-12 Schnittiefeneinstellmechanismus

Publications (1)

Publication Number Publication Date
US4335768A true US4335768A (en) 1982-06-22

Family

ID=8186694

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/160,822 Expired - Lifetime US4335768A (en) 1980-06-12 1980-06-18 Depth of cut adjustment mechanism

Country Status (3)

Country Link
US (1) US4335768A (de)
AT (1) ATE9142T1 (de)
DE (1) DE3069062D1 (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693648A (en) * 1986-06-19 1987-09-15 The Singer Company Depth of cut adjusting mechanism
US5771949A (en) * 1996-06-05 1998-06-30 Black & Decker Inc. Portable wood planing machine
US5927357A (en) * 1997-12-30 1999-07-27 Black & Decker Inc. Portable wood planing machine
USD444481S1 (en) 2000-07-31 2001-07-03 Emerson Electric Co. Thickness planer
USD460089S1 (en) 2001-07-30 2002-07-09 Delta International Machinery Corp. Planer
CN1104313C (zh) * 1997-04-04 2003-04-02 罗伯特-博希股份公司 电动机传动的手工刨机
US6585017B1 (en) 2000-08-01 2003-07-01 Emerson Electric Co. Thickness planer with locking mechanism
RU2231441C1 (ru) * 2003-03-18 2004-06-27 Пономарев Лев Александрович Механический рубанок
US20050183271A1 (en) * 2004-02-25 2005-08-25 Makita Corporation Reciprocating saw
US20050211335A1 (en) * 2001-07-30 2005-09-29 Garcia Jaime E Planer apparatus
US20070079682A1 (en) * 2005-10-11 2007-04-12 Hummel Joseph S Saw calibration wheel
US20070151114A1 (en) * 2005-12-30 2007-07-05 Gabor Papp Hand-guided power tool rotating knob adjusting device
US20090293991A1 (en) * 2008-05-28 2009-12-03 Black & Decker Inc. Planer
WO2010020170A1 (zh) * 2008-08-20 2010-02-25 苏州宝时得电动工具有限公司 刨床
WO2010042980A1 (en) * 2008-10-13 2010-04-22 Peter Atlagic Improvements in hand held, electrically powered, wood planers
US20170129129A1 (en) * 2014-06-25 2017-05-11 Robert Bosch Gmbh Portable Machine Tool

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1305734A (en) * 1919-06-03 mooee
US1432860A (en) * 1919-08-07 1922-10-24 Luster Jordan Company Hand planer
US1527785A (en) * 1924-01-10 1925-02-24 Ray L Carter Plane
US1812755A (en) * 1930-05-02 1931-06-30 Frank M Quinsler Power driven plane
CH263087A (de) 1947-04-24 1949-08-15 Max Mueller Elektro-Balkenhobel
US2746499A (en) * 1952-05-03 1956-05-22 Leo O Greeley Powered hand plane
US2771105A (en) * 1955-09-14 1956-11-20 Rotex Company Power driven hand tools
US2774399A (en) * 1955-03-15 1956-12-18 Porter Cable Machine Co Power operated wood plane with chip and shaving discharge means
DE1080764B (de) * 1956-04-25 1960-04-28 Reich Maschf Gmbh Karl Spaeneabfuehrung an Handhobelmaschinen
DE1860337U (de) * 1962-08-09 1962-10-18 Metabowerke Kg Elektrischer handhobel.
US3407857A (en) * 1966-12-30 1968-10-29 Rockwell Mfg Co Plane
DE7013796U (de) 1970-04-15 1970-07-30 Lutz Kg Maschf Eugen Handhobel.
DE2141584A1 (de) 1971-08-19 1973-03-01 Reich Maschf Gmbh Karl Gehaeuse fuer handmaschine

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1305734A (en) * 1919-06-03 mooee
US1432860A (en) * 1919-08-07 1922-10-24 Luster Jordan Company Hand planer
US1527785A (en) * 1924-01-10 1925-02-24 Ray L Carter Plane
US1812755A (en) * 1930-05-02 1931-06-30 Frank M Quinsler Power driven plane
CH263087A (de) 1947-04-24 1949-08-15 Max Mueller Elektro-Balkenhobel
US2746499A (en) * 1952-05-03 1956-05-22 Leo O Greeley Powered hand plane
US2774399A (en) * 1955-03-15 1956-12-18 Porter Cable Machine Co Power operated wood plane with chip and shaving discharge means
US2771105A (en) * 1955-09-14 1956-11-20 Rotex Company Power driven hand tools
DE1080764B (de) * 1956-04-25 1960-04-28 Reich Maschf Gmbh Karl Spaeneabfuehrung an Handhobelmaschinen
DE1860337U (de) * 1962-08-09 1962-10-18 Metabowerke Kg Elektrischer handhobel.
US3407857A (en) * 1966-12-30 1968-10-29 Rockwell Mfg Co Plane
DE7013796U (de) 1970-04-15 1970-07-30 Lutz Kg Maschf Eugen Handhobel.
DE2141584A1 (de) 1971-08-19 1973-03-01 Reich Maschf Gmbh Karl Gehaeuse fuer handmaschine

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693648A (en) * 1986-06-19 1987-09-15 The Singer Company Depth of cut adjusting mechanism
US6089287A (en) * 1995-07-20 2000-07-18 Black & Decker Inc. Portable wood planing machine
US5771949A (en) * 1996-06-05 1998-06-30 Black & Decker Inc. Portable wood planing machine
CN1104313C (zh) * 1997-04-04 2003-04-02 罗伯特-博希股份公司 电动机传动的手工刨机
US5927357A (en) * 1997-12-30 1999-07-27 Black & Decker Inc. Portable wood planing machine
USD444481S1 (en) 2000-07-31 2001-07-03 Emerson Electric Co. Thickness planer
US6585017B1 (en) 2000-08-01 2003-07-01 Emerson Electric Co. Thickness planer with locking mechanism
US7055561B2 (en) 2001-07-30 2006-06-06 Delta International Machinery Corp. Planer apparatus
US20080092987A1 (en) * 2001-07-30 2008-04-24 Garcia Jaime E Planer apparatus
US7546859B2 (en) 2001-07-30 2009-06-16 Black & Decker Inc. Planer apparatus
US20050211335A1 (en) * 2001-07-30 2005-09-29 Garcia Jaime E Planer apparatus
US6951231B2 (en) 2001-07-30 2005-10-04 Black And Decker, Inc. Planer apparatus
US20050224141A1 (en) * 2001-07-30 2005-10-13 Garcia Jaime E Planer apparatus
US20050224140A1 (en) * 2001-07-30 2005-10-13 Garcia Jaime E Planer apparatus
USD460089S1 (en) 2001-07-30 2002-07-09 Delta International Machinery Corp. Planer
RU2231441C1 (ru) * 2003-03-18 2004-06-27 Пономарев Лев Александрович Механический рубанок
US20050183271A1 (en) * 2004-02-25 2005-08-25 Makita Corporation Reciprocating saw
US7395603B2 (en) * 2004-02-25 2008-07-08 Makita Corporation Reciprocating saw
US20070079682A1 (en) * 2005-10-11 2007-04-12 Hummel Joseph S Saw calibration wheel
US7299730B2 (en) 2005-10-11 2007-11-27 Hummel Joseph S Saw calibration wheel
CN101053950B (zh) * 2005-12-30 2010-09-29 罗伯特·博世有限公司 具有旋转手柄调节装置的手持式工具机
US20070151114A1 (en) * 2005-12-30 2007-07-05 Gabor Papp Hand-guided power tool rotating knob adjusting device
US20090293991A1 (en) * 2008-05-28 2009-12-03 Black & Decker Inc. Planer
US8136559B2 (en) * 2008-05-28 2012-03-20 Black & Decker Inc. Planer
WO2010020170A1 (zh) * 2008-08-20 2010-02-25 苏州宝时得电动工具有限公司 刨床
CN101653954B (zh) * 2008-08-20 2012-01-25 苏州宝时得电动工具有限公司 刨床
WO2010042980A1 (en) * 2008-10-13 2010-04-22 Peter Atlagic Improvements in hand held, electrically powered, wood planers
US20120297633A1 (en) * 2008-10-13 2012-11-29 Peter Atlagic Hand held, electrically powered, wood planers
US20170129129A1 (en) * 2014-06-25 2017-05-11 Robert Bosch Gmbh Portable Machine Tool
US10987823B2 (en) * 2014-06-25 2021-04-27 Robert Bosch Gmbh Portable machine tool

Also Published As

Publication number Publication date
DE3069062D1 (en) 1984-10-04
ATE9142T1 (de) 1984-09-15

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